@article{ref1,
title="Depiction of elderly and disabled people on road traffic signs: international comparison",
journal="British medical journal: BMJ",
year="2003",
author="Gale, R. P. and Gale, Christopher P. and Roper, T. A. and Mulley, Graham P.",
volume="327",
number="7429",
pages="1456-1457",
abstract="Abstract unavailable.",
language="",
issn="0959-8138",
doi="10.1136/bmj.327.7429.1456",
url="http://dx.doi.org/10.1136/bmj.327.7429.1456"
}